Upgrade to version 31
Default logstash_version to 1
Add support for run as a custom user

Default to root for backwards compatibility
Enhance Beaver Tail Resource

- allow a list of paths to be specific (instead of just one)
- avoid including empty parameters in template
- add support for multiline before/after regexs
Fix Rubocop Infractions
Increment to cookbook version 1.4.0
Merge branch 'improvements'

* improvements:
  Increment to cookbook version 1.4.0
  Fix Rubocop Infractions
  Enhance Beaver Tail Resource
  Add support for run as a custom user
  Default logstash_version to 1
  Upgrade to version 31